////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2016-2021 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Octave is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Octave; see the file COPYING.  If not, see
// <https://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////

#if ! defined (octave_lo_array_errwarn_h)
#define octave_lo_array_errwarn_h 1

#include "octave-config.h"

#include "dim-vector.h"
#include "quit.h"

namespace octave
{
  // Exception thrown by err_invalid_index
  // This is thrown when the invalid index is detected, at which point nd and dim
  // are usually not known.  It is caught at the place they are known, where a
  // new err_invalid_index  is called.
  //
  // Typically, this should be caught after any call to
  // octave_value_list::index_vector()

  class index_exception : public execution_exception
  {
  public:

    index_exception (const std::string& index, octave_idx_type nd = 0,
                     octave_idx_type dim = -1, const char *var = "")
      : m_index (index), m_nd (nd), m_dim (dim), m_var (var)
    {
      set_message (expression ());
    }

    ~index_exception (void) = default;

    // ID of error to throw.
    virtual const char * err_id (void) const = 0;

    // By default, update message to show the erroneous index expression.
    virtual void update_message (void) { set_message (expression ()); }

    // Position of error: dimension in error, and number of dimensions.
    void set_pos (octave_idx_type nd_arg, octave_idx_type dim_arg)
    {
      m_nd = nd_arg;
      m_dim = dim_arg;

      update_message ();
    }

    void set_pos_if_unset (octave_idx_type nd_arg, octave_idx_type dim_arg)
    {
      if (m_nd == 0)
        {
          m_nd  = nd_arg;
          m_dim = dim_arg;

          update_message ();
        }
    }

    // Name of variable being indexed.  eye(2)(1,1) gives "<unknown>".
    void set_var (const std::string& var_arg = "")
    {
      m_var = var_arg;

      update_message ();
    }

  private:

    // Value of invalid index.
    std::string m_index;

  protected:

    // Show what's wrong, e.g.,  A(-1,_), A(0+1i).
    OCTAVE_API std::string expression (void) const;

    // Number of dimensions of indexed object.
    octave_idx_type m_nd;

    // Dimension number in which invalid index occurred.
    octave_idx_type m_dim;

    // Name of variable being indexed.
    std::string m_var;
  };

  OCTAVE_NORETURN extern OCTAVE_API void
  err_nan_to_logical_conversion (void);

  OCTAVE_NORETURN extern OCTAVE_API void
  err_nan_to_character_conversion (void);

  OCTAVE_NORETURN extern OCTAVE_API void
  err_nonconformant (const char *op, octave_idx_type op1_len,
                     octave_idx_type op2_len);

  OCTAVE_NORETURN extern OCTAVE_API void
  err_nonconformant (const char *op,
                     octave_idx_type op1_nr, octave_idx_type op1_nc,
                     octave_idx_type op2_nr, octave_idx_type op2_nc);

  OCTAVE_NORETURN extern OCTAVE_API void
  err_nonconformant (const char *op,
                     const dim_vector& op1_dims, const dim_vector& op2_dims);

  OCTAVE_NORETURN extern OCTAVE_API void
  err_index_out_of_range (int ndims, int dim, octave_idx_type idx,
                          octave_idx_type ext, const dim_vector& dv);

#if defined (OCTAVE_PROVIDE_DEPRECATED_SYMBOLS)
  OCTAVE_DEPRECATED (6, "use err_index_out_of_range (int, int, octave_idx_type, octave_idx_type, const dim_vector&) instead")
  OCTAVE_NORETURN extern OCTAVE_API void
  err_index_out_of_range (int ndims, int dim, octave_idx_type idx,
                          octave_idx_type ext);
#endif

  OCTAVE_NORETURN extern OCTAVE_API void
  err_del_index_out_of_range (bool is1d, octave_idx_type iext,
                              octave_idx_type ext);

  OCTAVE_NORETURN extern OCTAVE_API void
  err_invalid_index (double n, octave_idx_type nd = 0,
                     octave_idx_type dim = 0,
                     const std::string& var = "");

  OCTAVE_NORETURN extern OCTAVE_API void
  err_invalid_index (octave_idx_type n, octave_idx_type nd = 0,
                     octave_idx_type dim = 0,
                     const std::string& var = "");

  OCTAVE_NORETURN extern OCTAVE_API void
  err_invalid_index (const std::string& idx, octave_idx_type nd = 0,
                     octave_idx_type dim = 0,
                     const std::string& var = "");

  OCTAVE_NORETURN extern OCTAVE_API void
  err_invalid_resize (void);

  extern OCTAVE_API void
  warn_singular_matrix (double rcond = 0.0);
}

#endif
